Air flow rate between rafters in a vented attic
I was wondering about something today, and I couldn’t really come across any research on the subject, though I haven’t really been looking that hard at the same time.
Does anyone know if there’s data out there on the volume flow rate of air from soffit vent to ridge vent in unconditioned, ventilated attics? Bonus case if it’s the flow rate near the surface of the sheathing between rafters. I had assumed that the flow rate near the ceiling joists was zero, and maximized near the region above the soffit vents. There are a lot of studies on the net free area requirement, but not much on the volume flow rate as a function of clime zone, roof pitch, surface material, etc.
Thoughts? $0.01 per article linked*!
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